Spindle and bobbin



(No Model.) 7

C. H. CHAPMAN.

SPI'NDLE AND BOBBIN.

No. 340,093. Patented Apr. 20, 1886.

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TATES NITE ATENT OFFICE.

CHARLES H. CHAPMAN, OF GROTON, ASSIGNOR TO THE EUREKA SPINDLE COMPANY, OF AYER, MASSACHUSETTS.

SPINDLF. AND BOBBIN.

SPECIFICATION forming part of Letters Patent No. 340,093, dated April 20, 1886.

Application filed December 18, 1885. Serial No. 186,050. (No model.)

To all whom it may concern:

Be it known that I, CHARLES H. CHAP- MAN, a citizen of the United States, residing at Groton, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Spindles and Bob bins; and I do hereby declare the following to be a full, clear, and exact description thereof.

1 My invention relates more particularly to that class of spindles having a sleeve-whirl, and in which the bobbin is driven by friction contact with the sleeve of such whirl; and it has for its object to prevent the spindle from being cramped or sprung out of true by the application of an imperfect bobbin.

As heretofore constructed, the sleeve of the whirl has been made with a straight uniform taper, upon which the lower end of the bob- 2O bin was seated and wedged. At the upper end the bobbin was provided with a bushing, which fitted the spindletip closely throughout the entire length of such bushing, and hence if the bobbin were imperfectly made or became warped by use, so that its two ends were not in perfect alignment, the spindle would be more or less sprung when the bobbin is forced down to its seat, causing the spindle to run unsteadily at high speed, or

else causing the bobbin to rise from its seat, and producing slack yarn. To overcome this defect I first provide a sleeve whirl having the upper part of the sleeve, which is to receive and drive the bobbin, constructed in a 5 spherical or oval form, in order to allow the bobbin to come to a seat on such spherical sleeve at any angle of approach without any tendency to spring the spindle.

To render this construction of the bobbinseat of still greater value, it is desirable that the bushing in the top of the bobbin should touch the spindle-tip at one point only, and that the bobbin should be free to rock on such point of contact, and thus allow it to seat it 5 self on the spherical body of the whirl without binding at the spindle-tip. This result may be reached by various forms of construction; but I consider the best method to be to construct the spindle-tip upon a taper, as

usual; but instead of forming the hole through the bushing of the bobbin with a corresponding taper, as heretofore, I make such hole through the bushing perfectly straight, and the bushing thereby takes a bearing at its lower edge only.

The accompanying drawing is a central sectional elevation showing the spindle and sleeve-whirl in elevation and the bobbin in section. It will be seen that the upper part of the whirl-sleeve s is made spherical or oval, Co as shown at a, that part of the sleeve below the sphere being reduced sufficiently so that the bobbin B shall take no bearing except at a. The'lower-internal bore of the bobbin is tapered in the usual manner and wedges upon the spherical seat a, as shown. The spindle A is tapered at the tip, as usual, while the hole through the upper end of the bobbin is straight, and hence it only bears upon the spindle-tip at the point 0. By this construction the bobbin bears at the two points a and 0 only, and being free to rock upon either of such points, itis impossible to spring or bind the spindle with a bobbin whose bearing-surfaces are not in proper alignment. It is evi- 7 dent that this construction at the tip may be reversed and the same results obtained ,by forming the spindle-tip straight and the hole through the bobbin on a taper; also by making such hole elliptical in form. E0

Having thus described my invention, what I claim is 1. A spindle provided with a spherical seat to receive and drive the bobbin, combined with a bobbin internally tapered at its lower end, and adapted to sleeve such seat and wedge thereon, as set forth.

2. A spindle provided with a spherical seat to receive and drive the bobbin, combined with a bobbin adapted to be driven by such 0 seat, and provided with an upper steadyingbushing adapted to bear upon the spindle-tip at one line of contact only and permit the bobbin to rock thereon-as it finds its seat below, as shown and described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES H. CHAPMAN. Vitnesses:

J B. GRAY, WILLIAM BROWN. 

